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/*

 * Copyright © 2011 Intel Corporation

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 *

 * Authors:

 *   Jesse Barnes 

 *

 * New plane/sprite handling.

 *

 * The older chips had a separate interface for programming plane related

 * registers; newer ones are much simpler and we can use the new DRM plane

 * support.

 */

#include 

#include 

#include 

#include 

#include 

#include 

#include "intel_drv.h"

#include 

#include "i915_drv.h"

static bool

format_is_yuv(uint32_t format)

{

	switch (format) {

	case DRM_FORMAT_YUYV:

	case DRM_FORMAT_UYVY:

	case DRM_FORMAT_VYUY:

	case DRM_FORMAT_YVYU:

		return true;

	default:

		return false;

	}

}

static int usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,

			      int usecs)

{

	/* paranoia */

	if (!adjusted_mode->crtc_htotal)

		return 1;

	return DIV_ROUND_UP(usecs * adjusted_mode->crtc_clock,

			    1000 * adjusted_mode->crtc_htotal);

}

/**

 * intel_pipe_update_start() - start update of a set of display registers

 * @crtc: the crtc of which the registers are going to be updated

 * @start_vbl_count: vblank counter return pointer used for error checking

 *

 * Mark the start of an update to pipe registers that should be updated

 * atomically regarding vblank. If the next vblank will happens within

 * the next 100 us, this function waits until the vblank passes.

 *

 * After a successful call to this function, interrupts will be disabled

 * until a subsequent call to intel_pipe_update_end(). That is done to

 * avoid random delays. The value written to @start_vbl_count should be

 * supplied to intel_pipe_update_end() for error checking.

 */

void intel_pipe_update_start(struct intel_crtc *crtc)

{

	struct drm_device *dev = crtc->base.dev;

	const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;

	enum pipe pipe = crtc->pipe;

	long timeout = msecs_to_jiffies_timeout(1);

	int scanline, min, max, vblank_start;

#if 0

//   wait_queue_head_t *wq = drm_crtc_vblank_waitqueue(&crtc->base);

//   DEFINE_WAIT(wait);

	vblank_start = adjusted_mode->crtc_vblank_start;

	if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)

		vblank_start = DIV_ROUND_UP(vblank_start, 2);

	/* FIXME needs to be calibrated sensibly */

	min = vblank_start - usecs_to_scanlines(adjusted_mode, 100);

	max = vblank_start - 1;

	if (min <= 0 || max <= 0)

		return;

//   if (WARN_ON(drm_vblank_get(dev, pipe)))

//       return false;

	crtc->debug.min_vbl = min;

	crtc->debug.max_vbl = max;

	trace_i915_pipe_update_start(crtc);

	for (;;) {

		/*

		 * prepare_to_wait() has a memory barrier, which guarantees

		 * other CPUs can see the task state update by the time we

		 * read the scanline.

		 */

		prepare_to_wait(wq, &wait, TASK_UNINTERRUPTIBLE);

		scanline = intel_get_crtc_scanline(crtc);

		if (scanline < min || scanline > max)

			break;

		if (timeout <= 0) {

			DRM_ERROR("Potential atomic update failure on pipe %c\n",

				  pipe_name(crtc->pipe));

			break;

		}

//       local_irq_enable();

        schedule_timeout(timeout);

        timeout = 0;

//       local_irq_disable();

	}

	finish_wait(wq, &wait);

#endif

	crtc->debug.scanline_start = scanline;

	crtc->debug.start_vbl_time = ktime_get();

	crtc->debug.start_vbl_count =

		dev->driver->get_vblank_counter(dev, pipe);

	trace_i915_pipe_update_vblank_evaded(crtc);

}

/**

 * intel_pipe_update_end() - end update of a set of display registers

 * @crtc: the crtc of which the registers were updated

 * @start_vbl_count: start vblank counter (used for error checking)

 *

 * Mark the end of an update started with intel_pipe_update_start(). This

 * re-enables interrupts and verifies the update was actually completed

 * before a vblank using the value of @start_vbl_count.

 */

void intel_pipe_update_end(struct intel_crtc *crtc)

{

	struct drm_device *dev = crtc->base.dev;

	enum pipe pipe = crtc->pipe;

	int scanline_end = intel_get_crtc_scanline(crtc);

	u32 end_vbl_count = dev->driver->get_vblank_counter(dev, pipe);

	ktime_t end_vbl_time = ktime_get();

	trace_i915_pipe_update_end(crtc, end_vbl_count, scanline_end);

//   local_irq_enable();

	if (crtc->debug.start_vbl_count &&

	    crtc->debug.start_vbl_count != end_vbl_count) {

		DRM_ERROR("Atomic update failure on pipe %c (start=%u end=%u) time %lld us, min %d, max %d, scanline start %d, end %d\n",

			  pipe_name(pipe), crtc->debug.start_vbl_count,

			  end_vbl_count,

			  ktime_us_delta(end_vbl_time, crtc->debug.start_vbl_time),

			  crtc->debug.min_vbl, crtc->debug.max_vbl,

			  crtc->debug.scanline_start, scanline_end);

	}

}

static void

skl_update_plane(struct drm_plane *drm_plane, struct drm_crtc *crtc,

		 struct drm_framebuffer *fb,

		 int crtc_x, int crtc_y,

		 unsigned int crtc_w, unsigned int crtc_h,

		 uint32_t x, uint32_t y,

		 uint32_t src_w, uint32_t src_h)

{

	struct drm_device *dev = drm_plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(drm_plane);

	struct drm_i915_gem_object *obj = intel_fb_obj(fb);

	const int pipe = intel_plane->pipe;

	const int plane = intel_plane->plane + 1;

	u32 plane_ctl, stride_div, stride;

	int pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);

	const struct drm_intel_sprite_colorkey *key =

		&to_intel_plane_state(drm_plane->state)->ckey;

	unsigned long surf_addr;

	u32 tile_height, plane_offset, plane_size;

	unsigned int rotation;

	int x_offset, y_offset;

	struct intel_crtc_state *crtc_state = to_intel_crtc(crtc)->config;

	int scaler_id;

	plane_ctl = PLANE_CTL_ENABLE |

		PLANE_CTL_PIPE_GAMMA_ENABLE |

		PLANE_CTL_PIPE_CSC_ENABLE;

	plane_ctl |= skl_plane_ctl_format(fb->pixel_format);

	plane_ctl |= skl_plane_ctl_tiling(fb->modifier[0]);

	rotation = drm_plane->state->rotation;

	plane_ctl |= skl_plane_ctl_rotation(rotation);

	intel_update_sprite_watermarks(drm_plane, crtc, src_w, src_h,

				       pixel_size, true,

				       src_w != crtc_w || src_h != crtc_h);

	stride_div = intel_fb_stride_alignment(dev, fb->modifier[0],

					       fb->pixel_format);

	scaler_id = to_intel_plane_state(drm_plane->state)->scaler_id;

	/* Sizes are 0 based */

	src_w--;

	src_h--;

	crtc_w--;

	crtc_h--;

	if (key->flags) {

		I915_WRITE(PLANE_KEYVAL(pipe, plane), key->min_value);

		I915_WRITE(PLANE_KEYMAX(pipe, plane), key->max_value);

		I915_WRITE(PLANE_KEYMSK(pipe, plane), key->channel_mask);

	}

	if (key->flags & I915_SET_COLORKEY_DESTINATION)

		plane_ctl |= PLANE_CTL_KEY_ENABLE_DESTINATION;

	else if (key->flags & I915_SET_COLORKEY_SOURCE)

		plane_ctl |= PLANE_CTL_KEY_ENABLE_SOURCE;

	surf_addr = intel_plane_obj_offset(intel_plane, obj, 0);

	if (intel_rotation_90_or_270(rotation)) {

		/* stride: Surface height in tiles */

		tile_height = intel_tile_height(dev, fb->pixel_format,

						fb->modifier[0], 0);

		stride = DIV_ROUND_UP(fb->height, tile_height);

		plane_size = (src_w << 16) | src_h;

		x_offset = stride * tile_height - y - (src_h + 1);

		y_offset = x;

	} else {

		stride = fb->pitches[0] / stride_div;

		plane_size = (src_h << 16) | src_w;

		x_offset = x;

		y_offset = y;

	}

	plane_offset = y_offset << 16 | x_offset;

	I915_WRITE(PLANE_OFFSET(pipe, plane), plane_offset);

	I915_WRITE(PLANE_STRIDE(pipe, plane), stride);

	I915_WRITE(PLANE_SIZE(pipe, plane), plane_size);

	/* program plane scaler */

	if (scaler_id >= 0) {

		uint32_t ps_ctrl = 0;

		DRM_DEBUG_KMS("plane = %d PS_PLANE_SEL(plane) = 0x%x\n", plane,

			PS_PLANE_SEL(plane));

		ps_ctrl = PS_SCALER_EN | PS_PLANE_SEL(plane) |

			crtc_state->scaler_state.scalers[scaler_id].mode;

		I915_WRITE(SKL_PS_CTRL(pipe, scaler_id), ps_ctrl);

		I915_WRITE(SKL_PS_PWR_GATE(pipe, scaler_id), 0);

		I915_WRITE(SKL_PS_WIN_POS(pipe, scaler_id), (crtc_x << 16) | crtc_y);

		I915_WRITE(SKL_PS_WIN_SZ(pipe, scaler_id),

			((crtc_w + 1) << 16)|(crtc_h + 1));

		I915_WRITE(PLANE_POS(pipe, plane), 0);

	} else {

		I915_WRITE(PLANE_POS(pipe, plane), (crtc_y << 16) | crtc_x);

	}

	I915_WRITE(PLANE_CTL(pipe, plane), plane_ctl);

	I915_WRITE(PLANE_SURF(pipe, plane), surf_addr);

	POSTING_READ(PLANE_SURF(pipe, plane));

}

static void

skl_disable_plane(struct drm_plane *dplane, struct drm_crtc *crtc)

{

	struct drm_device *dev = dplane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(dplane);

	const int pipe = intel_plane->pipe;

	const int plane = intel_plane->plane + 1;

	I915_WRITE(PLANE_CTL(pipe, plane), 0);

	I915_WRITE(PLANE_SURF(pipe, plane), 0);

	POSTING_READ(PLANE_SURF(pipe, plane));

	intel_update_sprite_watermarks(dplane, crtc, 0, 0, 0, false, false);

}

static void

chv_update_csc(struct intel_plane *intel_plane, uint32_t format)

{

	struct drm_i915_private *dev_priv = intel_plane->base.dev->dev_private;

	int plane = intel_plane->plane;

	/* Seems RGB data bypasses the CSC always */

	if (!format_is_yuv(format))

		return;

	/*

	 * BT.601 limited range YCbCr -> full range RGB

	 *

	 * |r|   | 6537 4769     0|   |cr  |

	 * |g| = |-3330 4769 -1605| x |y-64|

	 * |b|   |    0 4769  8263|   |cb  |

	 *

	 * Cb and Cr apparently come in as signed already, so no

	 * need for any offset. For Y we need to remove the offset.

	 */

	I915_WRITE(SPCSCYGOFF(plane), SPCSC_OOFF(0) | SPCSC_IOFF(-64));

	I915_WRITE(SPCSCCBOFF(plane), SPCSC_OOFF(0) | SPCSC_IOFF(0));

	I915_WRITE(SPCSCCROFF(plane), SPCSC_OOFF(0) | SPCSC_IOFF(0));

	I915_WRITE(SPCSCC01(plane), SPCSC_C1(4769) | SPCSC_C0(6537));

	I915_WRITE(SPCSCC23(plane), SPCSC_C1(-3330) | SPCSC_C0(0));

	I915_WRITE(SPCSCC45(plane), SPCSC_C1(-1605) | SPCSC_C0(4769));

	I915_WRITE(SPCSCC67(plane), SPCSC_C1(4769) | SPCSC_C0(0));

	I915_WRITE(SPCSCC8(plane), SPCSC_C0(8263));

	I915_WRITE(SPCSCYGICLAMP(plane), SPCSC_IMAX(940) | SPCSC_IMIN(64));

	I915_WRITE(SPCSCCBICLAMP(plane), SPCSC_IMAX(448) | SPCSC_IMIN(-448));

	I915_WRITE(SPCSCCRICLAMP(plane), SPCSC_IMAX(448) | SPCSC_IMIN(-448));

	I915_WRITE(SPCSCYGOCLAMP(plane), SPCSC_OMAX(1023) | SPCSC_OMIN(0));

	I915_WRITE(SPCSCCBOCLAMP(plane), SPCSC_OMAX(1023) | SPCSC_OMIN(0));

	I915_WRITE(SPCSCCROCLAMP(plane), SPCSC_OMAX(1023) | SPCSC_OMIN(0));

}

static void

vlv_update_plane(struct drm_plane *dplane, struct drm_crtc *crtc,

		 struct drm_framebuffer *fb,

		 int crtc_x, int crtc_y,

		 unsigned int crtc_w, unsigned int crtc_h,

		 uint32_t x, uint32_t y,

		 uint32_t src_w, uint32_t src_h)

{

	struct drm_device *dev = dplane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(dplane);

	struct drm_i915_gem_object *obj = intel_fb_obj(fb);

	int pipe = intel_plane->pipe;

	int plane = intel_plane->plane;

	u32 sprctl;

	unsigned long sprsurf_offset, linear_offset;

	int pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);

	const struct drm_intel_sprite_colorkey *key =

		&to_intel_plane_state(dplane->state)->ckey;

	sprctl = SP_ENABLE;

	switch (fb->pixel_format) {

	case DRM_FORMAT_YUYV:

		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_YUYV;

		break;

	case DRM_FORMAT_YVYU:

		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_YVYU;

		break;

	case DRM_FORMAT_UYVY:

		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_UYVY;

		break;

	case DRM_FORMAT_VYUY:

		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_VYUY;

		break;

	case DRM_FORMAT_RGB565:

		sprctl |= SP_FORMAT_BGR565;

		break;

	case DRM_FORMAT_XRGB8888:

		sprctl |= SP_FORMAT_BGRX8888;

		break;

	case DRM_FORMAT_ARGB8888:

		sprctl |= SP_FORMAT_BGRA8888;

		break;

	case DRM_FORMAT_XBGR2101010:

		sprctl |= SP_FORMAT_RGBX1010102;

		break;

	case DRM_FORMAT_ABGR2101010:

		sprctl |= SP_FORMAT_RGBA1010102;

		break;

	case DRM_FORMAT_XBGR8888:

		sprctl |= SP_FORMAT_RGBX8888;

		break;

	case DRM_FORMAT_ABGR8888:

		sprctl |= SP_FORMAT_RGBA8888;

		break;

	default:

		/*

		 * If we get here one of the upper layers failed to filter

		 * out the unsupported plane formats

		 */

		BUG();

		break;

	}

	/*

	 * Enable gamma to match primary/cursor plane behaviour.

	 * FIXME should be user controllable via propertiesa.

	 */

	sprctl |= SP_GAMMA_ENABLE;

	if (obj->tiling_mode != I915_TILING_NONE)

		sprctl |= SP_TILED;

	/* Sizes are 0 based */

	src_w--;

	src_h--;

	crtc_w--;

	crtc_h--;

	linear_offset = y * fb->pitches[0] + x * pixel_size;

	sprsurf_offset = intel_gen4_compute_page_offset(dev_priv,

							&x, &y,

							obj->tiling_mode,

							pixel_size,

							fb->pitches[0]);

	linear_offset -= sprsurf_offset;

	if (dplane->state->rotation == BIT(DRM_ROTATE_180)) {

		sprctl |= SP_ROTATE_180;

		x += src_w;

		y += src_h;

		linear_offset += src_h * fb->pitches[0] + src_w * pixel_size;

	}

	if (key->flags) {

		I915_WRITE(SPKEYMINVAL(pipe, plane), key->min_value);

		I915_WRITE(SPKEYMAXVAL(pipe, plane), key->max_value);

		I915_WRITE(SPKEYMSK(pipe, plane), key->channel_mask);

	}

	if (key->flags & I915_SET_COLORKEY_SOURCE)

		sprctl |= SP_SOURCE_KEY;

	if (IS_CHERRYVIEW(dev) && pipe == PIPE_B)

		chv_update_csc(intel_plane, fb->pixel_format);

	I915_WRITE(SPSTRIDE(pipe, plane), fb->pitches[0]);

	I915_WRITE(SPPOS(pipe, plane), (crtc_y << 16) | crtc_x);

	if (obj->tiling_mode != I915_TILING_NONE)

		I915_WRITE(SPTILEOFF(pipe, plane), (y << 16) | x);

	else

		I915_WRITE(SPLINOFF(pipe, plane), linear_offset);

	I915_WRITE(SPCONSTALPHA(pipe, plane), 0);

	I915_WRITE(SPSIZE(pipe, plane), (crtc_h << 16) | crtc_w);

	I915_WRITE(SPCNTR(pipe, plane), sprctl);

	I915_WRITE(SPSURF(pipe, plane), i915_gem_obj_ggtt_offset(obj) +

		   sprsurf_offset);

	POSTING_READ(SPSURF(pipe, plane));

}

static void

vlv_disable_plane(struct drm_plane *dplane, struct drm_crtc *crtc)

{

	struct drm_device *dev = dplane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(dplane);

	int pipe = intel_plane->pipe;

	int plane = intel_plane->plane;

	I915_WRITE(SPCNTR(pipe, plane), 0);

	I915_WRITE(SPSURF(pipe, plane), 0);

	POSTING_READ(SPSURF(pipe, plane));

}

static void

ivb_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,

		 struct drm_framebuffer *fb,

		 int crtc_x, int crtc_y,

		 unsigned int crtc_w, unsigned int crtc_h,

		 uint32_t x, uint32_t y,

		 uint32_t src_w, uint32_t src_h)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	struct drm_i915_gem_object *obj = intel_fb_obj(fb);

	enum pipe pipe = intel_plane->pipe;

	u32 sprctl, sprscale = 0;

	unsigned long sprsurf_offset, linear_offset;

	int pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);

	const struct drm_intel_sprite_colorkey *key =

		&to_intel_plane_state(plane->state)->ckey;

	sprctl = SPRITE_ENABLE;

	switch (fb->pixel_format) {

	case DRM_FORMAT_XBGR8888:

		sprctl |= SPRITE_FORMAT_RGBX888 | SPRITE_RGB_ORDER_RGBX;

		break;

	case DRM_FORMAT_XRGB8888:

		sprctl |= SPRITE_FORMAT_RGBX888;

		break;

	case DRM_FORMAT_YUYV:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_YUYV;

		break;

	case DRM_FORMAT_YVYU:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_YVYU;

		break;

	case DRM_FORMAT_UYVY:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_UYVY;

		break;

	case DRM_FORMAT_VYUY:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_VYUY;

		break;

	default:

		BUG();

	}

	/*

	 * Enable gamma to match primary/cursor plane behaviour.

	 * FIXME should be user controllable via propertiesa.

	 */

	sprctl |= SPRITE_GAMMA_ENABLE;

	if (obj->tiling_mode != I915_TILING_NONE)

		sprctl |= SPRITE_TILED;

	if (IS_HASWELL(dev) || IS_BROADWELL(dev))

		sprctl &= ~SPRITE_TRICKLE_FEED_DISABLE;

	else

		sprctl |= SPRITE_TRICKLE_FEED_DISABLE;

	if (IS_HASWELL(dev) || IS_BROADWELL(dev))

		sprctl |= SPRITE_PIPE_CSC_ENABLE;

	intel_update_sprite_watermarks(plane, crtc, src_w, src_h, pixel_size,

				       true,

				       src_w != crtc_w || src_h != crtc_h);

	/* Sizes are 0 based */

	src_w--;

	src_h--;

	crtc_w--;

	crtc_h--;

	if (crtc_w != src_w || crtc_h != src_h)

		sprscale = SPRITE_SCALE_ENABLE | (src_w << 16) | src_h;

	linear_offset = y * fb->pitches[0] + x * pixel_size;

	sprsurf_offset =

		intel_gen4_compute_page_offset(dev_priv,

					       &x, &y, obj->tiling_mode,

					       pixel_size, fb->pitches[0]);

	linear_offset -= sprsurf_offset;

	if (plane->state->rotation == BIT(DRM_ROTATE_180)) {

		sprctl |= SPRITE_ROTATE_180;

		/* HSW and BDW does this automagically in hardware */

		if (!IS_HASWELL(dev) && !IS_BROADWELL(dev)) {

			x += src_w;

			y += src_h;

			linear_offset += src_h * fb->pitches[0] +

				src_w * pixel_size;

		}

	}

	if (key->flags) {

		I915_WRITE(SPRKEYVAL(pipe), key->min_value);

		I915_WRITE(SPRKEYMAX(pipe), key->max_value);

		I915_WRITE(SPRKEYMSK(pipe), key->channel_mask);

	}

	if (key->flags & I915_SET_COLORKEY_DESTINATION)

		sprctl |= SPRITE_DEST_KEY;

	else if (key->flags & I915_SET_COLORKEY_SOURCE)

		sprctl |= SPRITE_SOURCE_KEY;

	I915_WRITE(SPRSTRIDE(pipe), fb->pitches[0]);

	I915_WRITE(SPRPOS(pipe), (crtc_y << 16) | crtc_x);

	/* HSW consolidates SPRTILEOFF and SPRLINOFF into a single SPROFFSET

	 * register */

	if (IS_HASWELL(dev) || IS_BROADWELL(dev))

		I915_WRITE(SPROFFSET(pipe), (y << 16) | x);

	else if (obj->tiling_mode != I915_TILING_NONE)

		I915_WRITE(SPRTILEOFF(pipe), (y << 16) | x);

	else

		I915_WRITE(SPRLINOFF(pipe), linear_offset);

	I915_WRITE(SPRSIZE(pipe), (crtc_h << 16) | crtc_w);

	if (intel_plane->can_scale)

		I915_WRITE(SPRSCALE(pipe), sprscale);

	I915_WRITE(SPRCTL(pipe), sprctl);

	I915_WRITE(SPRSURF(pipe),

		   i915_gem_obj_ggtt_offset(obj) + sprsurf_offset);

	POSTING_READ(SPRSURF(pipe));

}

static void

ivb_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	int pipe = intel_plane->pipe;

	I915_WRITE(SPRCTL(pipe), 0);

	/* Can't leave the scaler enabled... */

	if (intel_plane->can_scale)

		I915_WRITE(SPRSCALE(pipe), 0);

	I915_WRITE(SPRSURF(pipe), 0);

	POSTING_READ(SPRSURF(pipe));

}

static void

ilk_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,

		 struct drm_framebuffer *fb,

		 int crtc_x, int crtc_y,

		 unsigned int crtc_w, unsigned int crtc_h,

		 uint32_t x, uint32_t y,

		 uint32_t src_w, uint32_t src_h)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	struct drm_i915_gem_object *obj = intel_fb_obj(fb);

	int pipe = intel_plane->pipe;

	unsigned long dvssurf_offset, linear_offset;

	u32 dvscntr, dvsscale;

	int pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);

	const struct drm_intel_sprite_colorkey *key =

		&to_intel_plane_state(plane->state)->ckey;

	dvscntr = DVS_ENABLE;

	switch (fb->pixel_format) {

	case DRM_FORMAT_XBGR8888:

		dvscntr |= DVS_FORMAT_RGBX888 | DVS_RGB_ORDER_XBGR;

		break;

	case DRM_FORMAT_XRGB8888:

		dvscntr |= DVS_FORMAT_RGBX888;

		break;

	case DRM_FORMAT_YUYV:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_YUYV;

		break;

	case DRM_FORMAT_YVYU:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_YVYU;

		break;

	case DRM_FORMAT_UYVY:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_UYVY;

		break;

	case DRM_FORMAT_VYUY:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_VYUY;

		break;

	default:

		BUG();

	}

	/*

	 * Enable gamma to match primary/cursor plane behaviour.

	 * FIXME should be user controllable via propertiesa.

	 */

	dvscntr |= DVS_GAMMA_ENABLE;

	if (obj->tiling_mode != I915_TILING_NONE)

		dvscntr |= DVS_TILED;

	if (IS_GEN6(dev))

		dvscntr |= DVS_TRICKLE_FEED_DISABLE; /* must disable */

	intel_update_sprite_watermarks(plane, crtc, src_w, src_h,

				       pixel_size, true,

				       src_w != crtc_w || src_h != crtc_h);

	/* Sizes are 0 based */

	src_w--;

	src_h--;

	crtc_w--;

	crtc_h--;

	dvsscale = 0;

	if (crtc_w != src_w || crtc_h != src_h)

		dvsscale = DVS_SCALE_ENABLE | (src_w << 16) | src_h;

	linear_offset = y * fb->pitches[0] + x * pixel_size;

	dvssurf_offset =

		intel_gen4_compute_page_offset(dev_priv,

					       &x, &y, obj->tiling_mode,

					       pixel_size, fb->pitches[0]);

	linear_offset -= dvssurf_offset;

	if (plane->state->rotation == BIT(DRM_ROTATE_180)) {

		dvscntr |= DVS_ROTATE_180;

		x += src_w;

		y += src_h;

		linear_offset += src_h * fb->pitches[0] + src_w * pixel_size;

	}

	if (key->flags) {

		I915_WRITE(DVSKEYVAL(pipe), key->min_value);

		I915_WRITE(DVSKEYMAX(pipe), key->max_value);

		I915_WRITE(DVSKEYMSK(pipe), key->channel_mask);

	}

	if (key->flags & I915_SET_COLORKEY_DESTINATION)

		dvscntr |= DVS_DEST_KEY;

	else if (key->flags & I915_SET_COLORKEY_SOURCE)

		dvscntr |= DVS_SOURCE_KEY;

	I915_WRITE(DVSSTRIDE(pipe), fb->pitches[0]);

	I915_WRITE(DVSPOS(pipe), (crtc_y << 16) | crtc_x);

	if (obj->tiling_mode != I915_TILING_NONE)

		I915_WRITE(DVSTILEOFF(pipe), (y << 16) | x);

	else

		I915_WRITE(DVSLINOFF(pipe), linear_offset);

	I915_WRITE(DVSSIZE(pipe), (crtc_h << 16) | crtc_w);

	I915_WRITE(DVSSCALE(pipe), dvsscale);

	I915_WRITE(DVSCNTR(pipe), dvscntr);

	I915_WRITE(DVSSURF(pipe),

		   i915_gem_obj_ggtt_offset(obj) + dvssurf_offset);

	POSTING_READ(DVSSURF(pipe));

}

static void

ilk_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	int pipe = intel_plane->pipe;

	I915_WRITE(DVSCNTR(pipe), 0);

	/* Disable the scaler */

	I915_WRITE(DVSSCALE(pipe), 0);

	I915_WRITE(DVSSURF(pipe), 0);

	POSTING_READ(DVSSURF(pipe));

}

static int

intel_check_sprite_plane(struct drm_plane *plane,

			 struct intel_crtc_state *crtc_state,

			 struct intel_plane_state *state)

{

	struct drm_device *dev = plane->dev;

	struct drm_crtc *crtc = state->base.crtc;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	struct intel_plane *intel_plane = to_intel_plane(plane);

	struct drm_framebuffer *fb = state->base.fb;

	int crtc_x, crtc_y;

	unsigned int crtc_w, crtc_h;

	uint32_t src_x, src_y, src_w, src_h;

	struct drm_rect *src = &state->src;

	struct drm_rect *dst = &state->dst;

	const struct drm_rect *clip = &state->clip;

	int hscale, vscale;

	int max_scale, min_scale;

	bool can_scale;

	int pixel_size;

	if (!fb) {

		state->visible = false;

		return 0;

	}

	/* Don't modify another pipe's plane */

	if (intel_plane->pipe != intel_crtc->pipe) {

		DRM_DEBUG_KMS("Wrong plane <-> crtc mapping\n");

		return -EINVAL;

	}

	/* FIXME check all gen limits */

	if (fb->width < 3 || fb->height < 3 || fb->pitches[0] > 16384) {

		DRM_DEBUG_KMS("Unsuitable framebuffer for plane\n");

		return -EINVAL;

	}

	/* setup can_scale, min_scale, max_scale */

	if (INTEL_INFO(dev)->gen >= 9) {

		/* use scaler when colorkey is not required */

		if (state->ckey.flags == I915_SET_COLORKEY_NONE) {

			can_scale = 1;

			min_scale = 1;

			max_scale = skl_max_scale(intel_crtc, crtc_state);

		} else {

			can_scale = 0;

			min_scale = DRM_PLANE_HELPER_NO_SCALING;

			max_scale = DRM_PLANE_HELPER_NO_SCALING;

		}

	} else {

		can_scale = intel_plane->can_scale;

		max_scale = intel_plane->max_downscale << 16;

		min_scale = intel_plane->can_scale ? 1 : (1 << 16);

	}

	/*

	 * FIXME the following code does a bunch of fuzzy adjustments to the

	 * coordinates and sizes. We probably need some way to decide whether

	 * more strict checking should be done instead.

	 */

	drm_rect_rotate(src, fb->width << 16, fb->height << 16,

			state->base.rotation);

	hscale = drm_rect_calc_hscale_relaxed(src, dst, min_scale, max_scale);

	BUG_ON(hscale < 0);

	vscale = drm_rect_calc_vscale_relaxed(src, dst, min_scale, max_scale);

	BUG_ON(vscale < 0);

	state->visible = drm_rect_clip_scaled(src, dst, clip, hscale, vscale);

	crtc_x = dst->x1;

	crtc_y = dst->y1;

	crtc_w = drm_rect_width(dst);

	crtc_h = drm_rect_height(dst);

	if (state->visible) {

		/* check again in case clipping clamped the results */

		hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);

		if (hscale < 0) {

			DRM_DEBUG_KMS("Horizontal scaling factor out of limits\n");

			drm_rect_debug_print(src, true);

			drm_rect_debug_print(dst, false);

			return hscale;

		}

		vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);

		if (vscale < 0) {

			DRM_DEBUG_KMS("Vertical scaling factor out of limits\n");

			drm_rect_debug_print(src, true);

			drm_rect_debug_print(dst, false);

			return vscale;

		}

		/* Make the source viewport size an exact multiple of the scaling factors. */

		drm_rect_adjust_size(src,

				     drm_rect_width(dst) * hscale - drm_rect_width(src),

				     drm_rect_height(dst) * vscale - drm_rect_height(src));

		drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16,

				    state->base.rotation);

		/* sanity check to make sure the src viewport wasn't enlarged */

		WARN_ON(src->x1 < (int) state->base.src_x ||

			src->y1 < (int) state->base.src_y ||

			src->x2 > (int) state->base.src_x + state->base.src_w ||

			src->y2 > (int) state->base.src_y + state->base.src_h);

		/*

		 * Hardware doesn't handle subpixel coordinates.

		 * Adjust to (macro)pixel boundary, but be careful not to

		 * increase the source viewport size, because that could

		 * push the downscaling factor out of bounds.

		 */

		src_x = src->x1 >> 16;

		src_w = drm_rect_width(src) >> 16;

		src_y = src->y1 >> 16;

		src_h = drm_rect_height(src) >> 16;

		if (format_is_yuv(fb->pixel_format)) {

			src_x &= ~1;

			src_w &= ~1;

			/*

			 * Must keep src and dst the

			 * same if we can't scale.

			 */

			if (!can_scale)

				crtc_w &= ~1;

			if (crtc_w == 0)

				state->visible = false;

		}

	}

	/* Check size restrictions when scaling */

	if (state->visible && (src_w != crtc_w || src_h != crtc_h)) {

		unsigned int width_bytes;

		WARN_ON(!can_scale);

		/* FIXME interlacing min height is 6 */

		if (crtc_w < 3 || crtc_h < 3)

			state->visible = false;

		if (src_w < 3 || src_h < 3)

			state->visible = false;

		pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);

		width_bytes = ((src_x * pixel_size) & 63) +

					src_w * pixel_size;

		if (INTEL_INFO(dev)->gen < 9 && (src_w > 2048 || src_h > 2048 ||

		    width_bytes > 4096 || fb->pitches[0] > 4096)) {

			DRM_DEBUG_KMS("Source dimensions exceed hardware limits\n");

			return -EINVAL;

		}

	}

	if (state->visible) {

		src->x1 = src_x << 16;

		src->x2 = (src_x + src_w) << 16;

		src->y1 = src_y << 16;

		src->y2 = (src_y + src_h) << 16;

	}

	dst->x1 = crtc_x;

	dst->x2 = crtc_x + crtc_w;

	dst->y1 = crtc_y;

	dst->y2 = crtc_y + crtc_h;

	return 0;

}

static void

intel_commit_sprite_plane(struct drm_plane *plane,

			  struct intel_plane_state *state)

{

	struct drm_crtc *crtc = state->base.crtc;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	struct drm_framebuffer *fb = state->base.fb;

	crtc = crtc ? crtc : plane->crtc;

	if (!crtc->state->active)

		return;

	if (state->visible) {

		intel_plane->update_plane(plane, crtc, fb,

					  state->dst.x1, state->dst.y1,

					  drm_rect_width(&state->dst),

					  drm_rect_height(&state->dst),

					  state->src.x1 >> 16,

					  state->src.y1 >> 16,

					  drm_rect_width(&state->src) >> 16,

					  drm_rect_height(&state->src) >> 16);

	} else {

		intel_plane->disable_plane(plane, crtc);

	}

}

int intel_sprite_set_colorkey(struct drm_device *dev, void *data,

			      struct drm_file *file_priv)

{

	struct drm_intel_sprite_colorkey *set = data;

	struct drm_plane *plane;

	struct drm_plane_state *plane_state;

	struct drm_atomic_state *state;

	struct drm_modeset_acquire_ctx ctx;

	int ret = 0;

	/* Make sure we don't try to enable both src & dest simultaneously */

	if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))

		return -EINVAL;

	if (IS_VALLEYVIEW(dev) &&

	    set->flags & I915_SET_COLORKEY_DESTINATION)

		return -EINVAL;

	plane = drm_plane_find(dev, set->plane_id);

	if (!plane || plane->type != DRM_PLANE_TYPE_OVERLAY)

		return -ENOENT;

	drm_modeset_acquire_init(&ctx, 0);

	state = drm_atomic_state_alloc(plane->dev);

	if (!state) {

		ret = -ENOMEM;

		goto out;

	}

	state->acquire_ctx = &ctx;

	while (1) {

		plane_state = drm_atomic_get_plane_state(state, plane);

		ret = PTR_ERR_OR_ZERO(plane_state);

		if (!ret) {

			to_intel_plane_state(plane_state)->ckey = *set;

			ret = drm_atomic_commit(state);

		}

		if (ret != -EDEADLK)

			break;

		drm_atomic_state_clear(state);

		drm_modeset_backoff(&ctx);

	}

	if (ret)

		drm_atomic_state_free(state);

out:

	drm_modeset_drop_locks(&ctx);

	drm_modeset_acquire_fini(&ctx);

	return ret;

}

static const uint32_t ilk_plane_formats[] = {

	DRM_FORMAT_XRGB8888,

	DRM_FORMAT_YUYV,

	DRM_FORMAT_YVYU,

	DRM_FORMAT_UYVY,

	DRM_FORMAT_VYUY,

};

static const uint32_t snb_plane_formats[] = {

	DRM_FORMAT_XBGR8888,

	DRM_FORMAT_XRGB8888,

	DRM_FORMAT_YUYV,

	DRM_FORMAT_YVYU,

	DRM_FORMAT_UYVY,

	DRM_FORMAT_VYUY,

};

static const uint32_t vlv_plane_formats[] = {

	DRM_FORMAT_RGB565,

	DRM_FORMAT_ABGR8888,

	DRM_FORMAT_ARGB8888,

	DRM_FORMAT_XBGR8888,

	DRM_FORMAT_XRGB8888,

	DRM_FORMAT_XBGR2101010,

	DRM_FORMAT_ABGR2101010,

	DRM_FORMAT_YUYV,

	DRM_FORMAT_YVYU,

	DRM_FORMAT_UYVY,

	DRM_FORMAT_VYUY,

};

static uint32_t skl_plane_formats[] = {

	DRM_FORMAT_RGB565,

	DRM_FORMAT_ABGR8888,

	DRM_FORMAT_ARGB8888,

	DRM_FORMAT_XBGR8888,

	DRM_FORMAT_XRGB8888,

	DRM_FORMAT_YUYV,

	DRM_FORMAT_YVYU,

	DRM_FORMAT_UYVY,

	DRM_FORMAT_VYUY,

};

int

intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)

{

	struct intel_plane *intel_plane;

	struct intel_plane_state *state;

	unsigned long possible_crtcs;

	const uint32_t *plane_formats;

	int num_plane_formats;

	int ret;

	if (INTEL_INFO(dev)->gen < 5)

		return -ENODEV;

	intel_plane = kzalloc(sizeof(*intel_plane), GFP_KERNEL);

	if (!intel_plane)

		return -ENOMEM;

	state = intel_create_plane_state(&intel_plane->base);

	if (!state) {